return to where one started from

回到开始的地方

Example Jenny had great ideas for the upcoming training conference but her budget was taken away at the last minute so she had to start back at square one.

例如  詹妮对即将进行的培训会议有很多特别好的想法，但是她的预算在最后关头被拿掉，所以她不得不从头再来。